Software emulated serial using hardware timers for improved compatibility
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README.md

#AltSoftSerial Library#

Improved software emulated serial, using hardware timers for precise signal timing and availability of CPU time for other libraries to respond to interrupts during data AltSoftSerial data transmission and reception.

http://www.pjrc.com/teensy/td_libs_AltSoftSerial.html

AltSoftSerial on Teensy 2.0

Modified by AST to support the CAN485 board

CAN485 Repository and product page

Enables software serial on pins 9 (rx) and 5 (tx).

Note! Using software serial will disable pwm on pins 6 and 7.